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参数资料
| 型号： | AD8343-EVAL |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | DC-to-2.5 GHz High IP3 Active Mixer |
| 中文描述： | DC至2.5GHz的高IP3有源混频器 |
| 文件页数： | 17/27页 |
| 文件大小： | 394K |
| 代理商： | AD8343-EVAL |
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REV. 0
AD8343
–17–
The plotted stability circles in Figure 14 indicate that the guiding
principle for preventing stability problems due to common-mode
output loading is to avoid high-Q common-mode inductive load-
ing. This stability concern is of particular importance when the
output is taken from the device with a center-tapped transformer.
The common-mode inductance to the center tap, which arises
from imperfect coupling between the halves of the primary wind-
ing, produces an unstable common-mode loading condition.
Fortunately, there is a simple solution: insert a ferrite bead in
series with the center tap, then provide effective RF bypassing on
the power supply side of the bead. The bead should develop sub-
stantial impedance (tens of ohms) by the time a frequency of about
200 MHz is reached. The Murata BLM21P300S is a possible
choice for many applications.
50MHz
150MHz
FREQUENCY: 50MHz TO 2500MHz
INCREMENT: 100MHz
Figure 13. Common-Mode Input Stability Circles
150MHz
50MHz
FREQUENCY: 50MHz TO 2500MHz
INCREMENT: 100MHz
Figure 14. Common-Mode Output Stability Circles
1nH
0.1 F
VPOS
HP8753C
NETWORK ANALYZER
ATN-4111B
S PARAMETER TEST SET
HP-IB
ATN-4000 SERIES
MULTIPORT
TEST SYSTEM
0.1 F
14
13
12
11
10
9
8
1
2
3
4
5
6
7
COMM
AD8343
INPP
INPM
DCPL
VPOS
PWDN
COMM
COMM
OUTP
OUTM
COMM
LOIP
LOIM
COMM
TEE
TEE
TEE
TEE
Figure 15. Impedance and Stability Circle Test Schematic
In cases where a transmission line balun is used at the output,
the solution needs more exploration. After the differential imped-
ance matching network is designed, it is possible to measure
or simulate the common-mode impedance seen by the device.
This impedance should be plotted against the stability circles to
ensure stable operation. An alternate topology for the matching
network may be required if the proposed network produces an
unacceptable common-mode impedance.
For the device input, capacitive common-mode loading produces
an unstable circuit, particularly at low frequencies (Figure 13).
Fortunately, either type of single-ended-to-differential conver-
sion (transmission line balun or flux-coupled transformer) tends
to produce inductive loading, although some matching network
topologies and/or component values could circumvent this
desirable behavior. In general, a simulation of the common-mode
termination seen by the AD8343
’
s input port should be plotted
against the input stability circles to check stability. This is especially
recommended if the single-ended-to-differential conversion is done
with a discrete component circuit.
LO Input Interface (LOIP, LOIM)
The LO terminals of the AD8343 are internally biased; connec-
tions to these terminals should include dc blocks, except as
noted below in the DC Coupling the LO section.
The differential LO input return loss (re 50
is presented in
Figure 16. As shown, this port has a typical differential return
loss of better than 9.5 dB (2:1 VSWR). If better return loss is
desired for this port, differential matching techniques can also
be applied.
相关PDF资料 |
PDF描述 |
|---|---|
| AD8343ARU | DC-to-2.5 GHz High IP3 Active Mixer |
| AD8343ARU-REEL7 | DC-to-2.5 GHz High IP3 Active Mixer |
| AD8344 | Active Receive Mixer 400 MHz to 1.2 GHz |
| AD8344-EVAL | Active Receive Mixer 400 MHz to 1.2 GHz |
| AD8344ACPZ-REEL7 | Active Receive Mixer 400 MHz to 1.2 GHz |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8343-EVALZ | 制造商:Analog Devices 功能描述:AD8343 EVALUATION BOARD - Bulk |
| AD8344 | 制造商:AD 制造商全称:Analog Devices 功能描述:Active Receive Mixer 400 MHz to 1.2 GHz |
| AD8344ACPZ | 制造商:Analog Devices 功能描述:UP/DOWN CONV MIXER 5V 1.2GHZ 16LFCSP EP - Tape and Reel 制造商:Analog Devices 功能描述:IC SM RF MIXER 800MHZ |
| AD8344ACPZ | 制造商:Analog Devices 功能描述:IC RF MIXER 800MHZ SMD LFCSP-16 |
| AD8344ACPZ-REEL7 | 功能描述:IC MIXER 400MHZ-1.2GHZ 16-LFCSP RoHS:是 类别:RF/IF 和 RFID >> RF 混频器 系列:AD8344 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:100 系列:- RF 型:W-CDMA 频率:2.11GHz ~ 2.17GHz 混频器数目:1 增益:17dB 噪音数据:2.2dB 次要属性:- 电流 - 电源:11.7mA 电源电压:2.7 V ~ 3.3 V 包装:托盘 封装/外壳:12-VFQFN 裸露焊盘 供应商设备封装:12-QFN-EP（3x3） |
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